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Texas Instruments OPA363AIDR
- Part No.:
- OPA363AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA363AIDR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,283
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Product details
Overview
OPA363AIDR from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (1.8 V to 5.5 V). It delivers 7 MHz gain-bandwidth, 5 V/µs slew rate, and 90 dB typical CMRR, with shutdown capability (<1 µA quiescent current per channel) - enabling precision signal conditioning in battery-powered microphone preamplifiers and portable data acquisition systems.
For engineers reviewing the OPA363AIDR datasheet, OPA363AIDR pinout, OPA363AIDR application, or OPA363AIDR equivalent, key selection criteria include its 500 µV maximum input offset voltage, 750 µA maximum quiescent current at 5.5 V, rail-to-rail I/O swing within 10 mV of supply rails, and verified performance across –40°C to +125°C industrial temperature range.
Technical Context
The OPA363AIDR employs a complementary CMOS input stage that eliminates crossover distortion, ensuring monotonic common-mode response and high differential linearity - critical for driving SAR and delta-sigma ADCs without THD degradation. Its internal charge-pump topology enables rail-to-rail output swing even at 1.8 V supply.
Unlike the pin-compatible OPA364, the OPA363AIDR includes a dedicated enable/shutdown pin (Pin 5 in SOIC-8), allowing dynamic power control in multi-stage analog signal chains. The device is unity-gain stable and exhibits no phase reversal under overdrive conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5.5 V single supply - supports direct interfacing with Li-ion batteries and 3.3 V/5 V logic without level-shifting. |
| Gain-Bandwidth Product | 7 MHz - enables stable closed-loop gain ≥10 at audio bandwidth (20 kHz) with margin for filter roll-off. |
| Input Offset Voltage | ≤500 µV (max) - ensures ≤0.01% gain error in 5 V full-scale sensor amplification circuits. |
| Slew Rate | 5 V/µs - supports clean 1 Vpp, 500 kHz sine wave output without slewing distortion. |
| CMRR | 90 dB (typical) - rejects >30 kΩ unbalanced source impedance noise in single-ended sensor interfaces. |
| Shutdown Current | <1 µA per channel - reduces system standby power by >99% vs active mode (750 µA). |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and outdoor IoT node deployment. |
Pinout & Package
OPA363AIDR is supplied in an 8-pin SOIC (D package) with 4.90 mm × 3.91 mm body size. Pin 1 is marked via notch or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Amplifier output - drives ADC input or next-stage filter; rail-to-rail swing supports full-scale utilization of 12-bit+ converters. |
| 2 | –IN | Inverting input - accepts feedback network; high CMRR enables accurate differential-to-single-ended conversion. |
| 3 | +IN | Noninverting input - connects to sensor or reference; rail-to-rail common-mode range (V– – 0.1 V to V+ + 0.1 V) allows direct electret mic biasing. |
| 4 | V– | Negative supply - typically ground in single-supply systems; must be low-impedance to maintain PSRR >80 dB. |
| 5 | Enable | Active-high shutdown control - logic high (>0.75×V+) enables amplifier; logic low (<V– + 0.8 V) disables output and cuts IQ to <1 µA. |
| 6 | VOUT | Output - duplicate pin for thermal relief and layout flexibility; electrically identical to Pin 1. |
| 7 | V+ | Positive supply - accepts 1.8–5.5 V; internal charge pump ensures rail-to-rail output even at 1.8 V. |
| 8 | NC | No internal connection - must be left floating or tied to ground for mechanical stability; not usable as bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Output swings within 10 mV of V+ and V–; input common-mode extends 0.1 V beyond rails - enables direct coupling to 0 V-referenced sensors. |
| Shutdown mode | Logic-controlled disable reduces total supply current to <1 µA - ideal for duty-cycled audio front-ends in wearables. |
| No phase reversal | Input overdrive up to ±0.5 V beyond rails causes no output polarity inversion - prevents latch-up in protection circuits. |
| Low 1/f noise | 10 µVPP (0.1–10 Hz) - minimizes baseline drift in DC-coupled thermopile or strain gauge amplifiers. |
| High PSRR | 330 µV/V (max) - suppresses ripple from switching regulators feeding V+ without additional LDO filtering. |
Applications
| Microphone Preamplifier | Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying output of electret condenser microphones in voice-controlled IoT nodes. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op-amp configured as noninverting amplifier with 100 kΩ bias resistor and 5.9 kΩ feedback. Use Value: 7 MHz bandwidth preserves speech harmonics up to 4 kHz; 500 µV offset avoids DC bias shift in AC-coupled ADC inputs. |
Use Scenario: Buffering and scaling sensor outputs (e.g., RTD, thermocouple) before 16-bit SAR ADC sampling. IC Role / Device Role / Timing Role: Precision unity-gain buffer with 90 dB CMRR rejecting common-mode noise on long sensor cables. Use Value: 10 mV rail-to-rail swing maximizes ADC dynamic range; 17 nV/√Hz noise floor maintains ENOB ≥14 bits at 10 kHz. |
| Portable Medical Sensor | Industrial Process Monitor |
Use Scenario: Signal conditioning for wearable ECG electrodes with dry-contact skin interface. IC Role / Device Role / Timing Role: Low-noise, low-offset amplifier in first-stage instrumentation configuration with 1.8 V supply. Use Value: 1.8 V operation extends battery life; 0.6 fA/√Hz input current noise prevents electrode polarization errors. |
Use Scenario: Isolated 4–20 mA loop transmitter front-end in factory automation controllers. IC Role / Device Role / Timing Role: Rail-to-rail output driver converting DAC voltage to current-sense resistor voltage. Use Value: Shutdown pin enables power cycling during sleep modes; 125°C rating supports enclosure mounting near motors or drives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA364AIDR | No shutdown pin; 5-pin SOIC footprint; same GBW, offset, and noise specs. | Used where continuous operation is required and board space is constrained. | Select when shutdown functionality is unnecessary and PCB real estate must be minimized. |
| MCP6001T-I/OT | 1 MHz GBW, 0.6 V/µs slew rate, 2.5 mV max offset; SOT-23-5 package. | Targeted at cost-sensitive, low-bandwidth applications like battery monitoring. | Choose for sub-100 kHz signal paths where power savings outweigh precision requirements. |
Compared with OPA363AIDR, OPA364AIDR removes shutdown capability but reduces package size and cost, while MCP6001T-I/OT trades bandwidth and offset performance for lower price and smaller footprint - making OPA363AIDR optimal for precision, power-aware, medium-speed analog signal chains.
Availability
OPA363AIDR is available at Aetrix Electronics and suitable for portable medical devices, industrial process monitors, and voice-enabled IoT endpoints requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA363AIDR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision op-amps and low-power signal chain solutions.
The OPA363AIDR belongs to TI's OPAx363 family of rail-to-rail CMOS op-amps designed specifically for high-fidelity, low-voltage signal conditioning in battery-operated and thermally demanding environments.
FAQ
What is the maximum supply voltage for OPA363AIDR?
The OPA363AIDR supports a maximum supply voltage of 5.5 V across the V+ to V– terminals. Operation above this limit risks permanent damage, as specified in the Absolute Maximum Ratings table. At 5.5 V, quiescent current reaches 1.4 mA per channel, and output swing remains within 20 mV of both rails over the full –40°C to +125°C range.
Does OPA363AIDR require external compensation for unity-gain stability?
No, the OPA363AIDR is internally compensated and unity-gain stable. It drives capacitive loads up to 100 pF without oscillation, as validated in the Typical Characteristics section (Figure 19). For loads exceeding 100 pF, a small series resistor (10–50 Ω) at the output is recommended to maintain phase margin.
How does the Enable pin function on OPA363AIDR?
The Enable pin (Pin 5) is active-high: logic high (>0.75×V+) enables normal operation; logic low ( Yes, the OPA363AIDR is explicitly characterized for driving SAR and delta-sigma ADCs. Its excellent CMRR (90 dB), low THD+N (0.002%), and rail-to-rail output ensure minimal differential nonlinearity degradation. For optimal performance, use a 100 pF capacitor from output to ground to reduce charge injection during ADC sampling. The OPA363AIDR features ultra-low input bias current: ±1 pA typical and ±10 pA maximum at 25°C, with minimal drift over temperature. This enables high-impedance sensor interfaces (e.g., pH electrodes, piezoelectric transducers) without significant voltage error across feedback resistors up to 10 MΩ.Can OPA363AIDR drive an ADC input directly?
What is the input bias current specification for OPA363AIDR?
OPA363AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA363AIDR FAQ
1.How can I place an order for OPA363AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA363AIDR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for OPA363AIDR reliable?
The price and inventory of OPA363AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA363AIDR is usually 5 days.
3.What payment methods are accepted for OPA363AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA363AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA363AIDR?
OPA363AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA363AIDR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for OPA363AIDR?
For technical support, including OPA363AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA363AIDR requirements.
6.How does Aetrix verify that OPA363AIDR is sourced from the original manufacturer or authorized distributors?
All OPA363AIDR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA363AIDR meets industry standards.
7.What is the process for return or replacement of OPA363AIDR?
All OPA363AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA363AIDR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The OPA363AIDR part is unused and in its original packaging.
Return procedure for OPA363AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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